Is BRIP1 p.Ala334Thr (c.1000G>A) pathogenic?

BRIP1 p.Ala334Thr (c.1000G>A) is classified Uncertain significance in BRIP1 (ClinVar, Multiple submitters, 8 submitters; last evaluated 2026-01-13). AlphaMissense: ambiguous (0.4455); Very rare (popmax 0.00933%, afr); Associated with hereditary neoplastic syndrome.

What condition is associated with BRIP1 p.Ala334Thr (c.1000G>A)?

BRIP1 p.Ala334Thr (c.1000G>A) is associated with hereditary neoplastic syndrome, Fanconi anemia complementation group J, hereditary breast carcinoma (ClinVar).

How common is BRIP1 p.Ala334Thr (c.1000G>A) in the general population?

BRIP1 p.Ala334Thr (c.1000G>A) is very rare (popmax 0.00933%, afr) (gnomAD).

What do computational predictors say about BRIP1 p.Ala334Thr (c.1000G>A)?

AlphaMissense predicts ambiguous (score 0.4455) — an in-silico prediction, not a clinical call.

BRIP1 p.Ala334Thr

c.1000G>A · rs535414791 · VCV230188

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 8 submitters

AlphaMissense

ambiguous

0.4455 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00933%, afr)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.4455	ambiguous
REVEL	0.583	indeterminate
SaProt	LLR -10.25	damaging
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 2, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 68 kb · p 0.065 · regional, not allelic
Overall
CADD	26.9	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00933% African / African-American · 7/75,032 alleles

Filtering AF 0.00437% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00308%

Overall 0.00198% 32/1,613,998 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00933%	10,719
Remaining individualsnot grpmax-eligible	0.0048%	20,837
European (non-Finnish)	0.00186%	53,632

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: BRIP1
Protein: p.Ala334Thr
Coding: c.1000G>A
MANE Select: NM_032043
dbSNP: rs535414791
Type: single nucleotide variant
Location: chr17:61801393 (GRCh38)
Gene constraint: LOEUF 0.848 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 64.19 · 6 PDB
Residue 334: the helicase atp-binding domain

Full BRIP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Fanconi anemia complementation group J hereditary breast carcinoma

Similar variants

BRIP1 p.Ala334Gly Uncertain significance ★★ ⚠ same residue
BRIP1 p.Ala334Ser Uncertain significance ★★ ⚠ same residue
BRIP1 p.Ala334= Benign/Likely benign ★★ same residue
BRIP1 c.1140+1G>A Likely pathogenic ★★ same condition
BRIP1 c.1141-2A>C Likely pathogenic ★★ same condition
BRIP1 c.1141-2A>G Likely pathogenic ★★ same condition
BRIP1 c.1141-2A>T Likely pathogenic ★★ same condition
BRIP1 c.1340+1G>A Pathogenic/Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/brip1-p-ala334thr (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown